System and method for reducing baffle vibration

Abstract

Adjustments to an electro-acoustic transducer may be made to match the performance of a second electro-acoustic transducer such that a net inertial force generated by movement of the electro-acoustic transducers' diaphragms are substantially zero. Adjustments may include adjusting a moving mass of one of the elector-acoustic transducers. Adjustments may include applying an equalization to one of the electro-acoustic transducers.

What is claimed: 
     
       1. A system comprising:
 a housing attached to a baffle, the housing supporting a plurality of electro-acoustic transducers having substantially the same performance characteristics in an asymmetric configuration applying a different acoustic load to at least one of the plurality of electro-acoustic transducers than is applied to at least one other of the plurality of electro-acoustic transducers; and 
 a predetermined mass attached to the at least one of the plurality of electro-acoustic transducers, the mass selected based upon a configuration of the housing to reduce a net mechanical force generated by the plurality of electro-acoustic transducers acting on the baffle by at least one order of magnitude relative to an inertial force generated by a single electro-acoustic transducer of the same type. 
 
     
     
       2. The system of  claim 1  wherein the predetermined mass is selected to reduce the net mechanical force by at least two orders of magnitude relative to the inertial force generated by a single electro-acoustic transducer of the same type. 
     
     
       3. The system of  claim 1  wherein at least two of the plurality of electro-acoustic transducers are acoustically coupled through a coupling volume. 
     
     
       4. The system of  claim 1  wherein the plurality of electro-acoustic transducers are woofers. 
     
     
       5. The system of  claim 1  wherein the asymmetric configuration includes a duct coupling one of the plurality of electro-acoustic transducers. 
     
     
       6. A method of reducing baffle vibration in a housing supporting a first and a second electro-acoustic transducer having substantially the same performance characteristics in an asymmetric configuration applying different acoustic loads to the first and second electro-acoustic transducers, the method comprising adjusting the second electro-acoustic transducer such that a net mechanical force generated by the first and second electro-acoustic transducers is substantially zero,
 wherein the step of adjusting includes attaching a predetermined mass selected based upon a configuration of the housing to a moving element of the first electro-acoustic transducer. 
 
     
     
       7. The method of  claim 6  wherein the predetermined mass is based on the asymmetric configuration.